{"payload":{"allShortcutsEnabled":false,"path":"14 - Function parameters","repo":{"id":210361223,"defaultBranch":"master","name":"c9-python-getting-started","ownerLogin":"shenjinian","currentUserCanPush":false,"isFork":true,"isEmpty":false,"createdAt":"2019-09-23T13:23:48.000Z","ownerAvatar":"https://avatars.githubusercontent.com/u/30257406?v=4","public":true,"private":false,"isOrgOwned":false},"currentUser":null,"refInfo":{"name":"master","listCacheKey":"v0:1614224184.9839392","canEdit":false,"refType":"branch","currentOid":"b09501b9f7dfc42daf9d63b9b26b2006fa1b04f2"},"tree":{"items":[{"name":"code_challenge.py","path":"14 - Function parameters/code_challenge.py","contentType":"file"},{"name":"code_challenge_solution.py","path":"14 - Function parameters/code_challenge_solution.py","contentType":"file"},{"name":"get_initials_default_values.py","path":"14 - Function parameters/get_initials_default_values.py","contentType":"file"},{"name":"get_initials_function.py","path":"14 - Function parameters/get_initials_function.py","contentType":"file"},{"name":"get_initials_multiple_parameters.py","path":"14 - Function parameters/get_initials_multiple_parameters.py","contentType":"file"},{"name":"get_initials_named_parameters.py","path":"14 - Function parameters/get_initials_named_parameters.py","contentType":"file"},{"name":"named_parameters_make_code_readable.py","path":"14 - Function parameters/named_parameters_make_code_readable.py","contentType":"file"},{"name":"readme.md","path":"14 - Function parameters/readme.md","contentType":"file"}],"templateDirectorySuggestionUrl":null,"readme":{"displayName":"readme.md","richText":"\u003carticle class=\"markdown-body entry-content container-lg\" itemprop=\"text\"\u003e\u003cdiv class=\"markdown-heading\" dir=\"auto\"\u003e\u003ch1 tabindex=\"-1\" class=\"heading-element\" dir=\"auto\"\u003eFunction parameters\u003c/h1\u003e\u003ca id=\"user-content-function-parameters\" class=\"anchor\" aria-label=\"Permalink: Function parameters\" href=\"#function-parameters\"\u003e\u003csvg class=\"octicon octicon-link\" viewBox=\"0 0 16 16\" version=\"1.1\" width=\"16\" height=\"16\" aria-hidden=\"true\"\u003e\u003cpath d=\"m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a1.998 1.998 0 0 0 0 2.83Z\"\u003e\u003c/path\u003e\u003c/svg\u003e\u003c/a\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eFunctions allow you to take code that is repeated and move it to a module that can be called when needed. Functions are defined with the \u003ccode\u003edef\u003c/code\u003e keyword and must be declared before the function is called in your code. Functions can accept one or more parameters and return values.\u003c/p\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003e\u003ca href=\"https://docs.python.org/3/tutorial/controlflow.html#defining-functions\" rel=\"nofollow\"\u003eFunctions\u003c/a\u003e\u003c/li\u003e\n\u003c/ul\u003e\n\u003cdiv class=\"highlight highlight-source-python notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"def function_name(parameter):\n # code to execute\n return value\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003edef\u003c/span\u003e \u003cspan class=\"pl-en\"\u003efunction_name\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003eparameter\u003c/span\u003e):\n \u003cspan class=\"pl-c\"\u003e# code to execute\u003c/span\u003e\n \u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003evalue\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eParameters can be assigned a \u003ca href=\"https://docs.python.org/3/tutorial/controlflow.html#default-argument-values\" rel=\"nofollow\"\u003edefault value\u003c/a\u003e making them optional when the function is called.\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-python notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"def function_name(parameter=default):\n # code to execute\n return value\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003edef\u003c/span\u003e \u003cspan class=\"pl-en\"\u003efunction_name\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003eparameter\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003edefault\u003c/span\u003e):\n \u003cspan class=\"pl-c\"\u003e# code to execute\u003c/span\u003e\n \u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003evalue\u003c/span\u003e\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eWhen you call a function you may specify the values for the parameters using positional or \u003ca href=\"https://docs.python.org/3/tutorial/controlflow.html#keyword-arguments\" rel=\"nofollow\"\u003enamed notation\u003c/a\u003e\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-python notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"def function_name(parameter1, parameter2):\n # code to execute\n return value\n\n# Positional notation pass in arguments in same order as parameters are declared\nresult = function_name(value1,value2)\n\n# Named notation\nresult = function_name(parameter1=value1, parameter2=value2)\"\u003e\u003cpre\u003e\u003cspan class=\"pl-k\"\u003edef\u003c/span\u003e \u003cspan class=\"pl-en\"\u003efunction_name\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003eparameter1\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eparameter2\u003c/span\u003e):\n \u003cspan class=\"pl-c\"\u003e# code to execute\u003c/span\u003e\n \u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-s1\"\u003evalue\u003c/span\u003e\n\n\u003cspan class=\"pl-c\"\u003e# Positional notation pass in arguments in same order as parameters are declared\u003c/span\u003e\n\u003cspan class=\"pl-s1\"\u003eresult\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e \u003cspan class=\"pl-en\"\u003efunction_name\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003evalue1\u003c/span\u003e,\u003cspan class=\"pl-s1\"\u003evalue2\u003c/span\u003e)\n\n\u003cspan class=\"pl-c\"\u003e# Named notation\u003c/span\u003e\n\u003cspan class=\"pl-s1\"\u003eresult\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e \u003cspan class=\"pl-en\"\u003efunction_name\u003c/span\u003e(\u003cspan class=\"pl-s1\"\u003eparameter1\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003evalue1\u003c/span\u003e, \u003cspan class=\"pl-s1\"\u003eparameter2\u003c/span\u003e\u003cspan class=\"pl-c1\"\u003e=\u003c/span\u003e\u003cspan class=\"pl-s1\"\u003evalue2\u003c/span\u003e)\u003c/pre\u003e\u003c/div\u003e\n\u003c/article\u003e","errorMessage":null,"headerInfo":{"toc":[{"level":1,"text":"Function parameters","anchor":"function-parameters","htmlText":"Function parameters"}],"siteNavLoginPath":"/login?return_to=https%3A%2F%2Fgithub.com%2Fshenjinian%2Fc9-python-getting-started%2Ftree%2Fmaster%2F14%2520-%2520Function%2520parameters"}},"totalCount":8,"showBranchInfobar":true},"fileTree":{"":{"items":[{"name":"10 - 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